CN104990512A - Transparent container bottle opening thread defect detection system and method - Google Patents
Transparent container bottle opening thread defect detection system and method Download PDFInfo
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- CN104990512A CN104990512A CN201510427634.XA CN201510427634A CN104990512A CN 104990512 A CN104990512 A CN 104990512A CN 201510427634 A CN201510427634 A CN 201510427634A CN 104990512 A CN104990512 A CN 104990512A
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Abstract
The invention provides a transparent container bottle opening thread defect detection system and method. The system comprises a plurality of camera and light source groups and an image processor connected to the camera and light source groups. Each camera and light source group comprises a camera and a light source, which are located on the same main optical axis; the camera is connected to the image processor and the light source is used for emitting parallel light. The camera and light source groups are uniformly distributed around a to-be-detected transparent container bottle opening. In any camera and light source group, the light source is under the bottle opening and the camera is above the bottle opening. The parallel light emitted by the light sources penetrates through a part of a to-be-detected thread area of the bottle opening and enters the cameras, so that partial thread images of the to-be-detected transparent container bottle opening are formed. The intersection point of the parallel light emitted by the plurality of light sources is located at the center area of the bottle opening. The image processor receives a plurality of the partial thread images formed by the cameras and determines whether the to-be-detected transparent container bottle opening thread is defective according to the images. The system can detect the defect of transparent container bottle openings accurately, and is high in detection precision, detection speed and stability.
Description
Technical field
The present invention relates to transparent vessel defect detecting technique field, particularly relate to a kind of transparent vessel whorl of bottleneck defect detecting system and method.
Background technology
Use spiral cover mode to seal in a large number at field containers such as food, beverage, medicines, spiral cover sealing leak is good, opens very convenient, can repeatedly open and screw simultaneously.But whether its sealing well depends on screw thread whether existing defects, when whorl of bottleneck exists the defects such as spacing is excessive or too small, screw thread is damaged, all numbers of screw thread are not enough, the sealing of sealing will be damaged, and the product that container is stored up will rapid deterioration.So on the production line using spiral cover container splendid attire product, be the important step ensureing product quality to the detection of the screw thread on container.
Container finish thread measurement conventional at present has two kinds of methods, and first method is by reflected light imaging, and general camera and light source are all at upper vessel portion, and camera enters top camera by catoptron mirrored sides screw thread, forms 360 ° of screw images.The advantage of this method is Polaroid whole screw thread can being observed.But there are two shortcomings, one is that anti-noise ability is poor, require the necessary unusual light in threaded portion surface, otherwise reflected light will form a lot of hot spot, picture quality degradation is to the degree that cannot detect; Two is that requirement container material quality is high to light reflectance, and is transmitted for transparent vessel major part light, and in vessel media interreflection, the while of causing screw image contrast very low, noise is a lot, cannot realize equally detecting.
Second method is for transparent vessel, and camera and light source are all parallel to screw thread and are arranged on bottleneck both sides, and the shade double thread produced by transmitted light screw thread is detected.This detection method also has two shortcomings, one is that camera needs to detect the screw thread near camera side, but the screw thread of light source side is same in the process of transmitted light produces a lot of shade, when causing imaging, both sides screw thread shade interweaves, thus image top shadow mixes and is not easily distinguishable, bring very large difficulty to detection, reducing accuracy of detection and decrease can measuring ability; Two is that the shade characteristic of screw thread is very sensitive to the visual angle of screw thread to camera, when there is high low jitter or tilt in the body in motion in on-line checkingi process, the screw thread shade significant difference that image produces, even the number of screw thread shade is completely different, under some open defects are easily hidden in abnormal screw thread shade simultaneously, this obviously brings higher false drop rate and loss, and the stability of detection is declined.
So for transparent vessel, stablizing high-precision thread measurement method is extensive and active demand, but existing detection method is difficult to reach the quality requirements that manufacturing enterprise and consumer improve day by day.
Given this, the transparent vessel whorl of bottleneck defect detecting system that a kind of accuracy of detection is high, detection speed is fast, stability is high and transparent vessel bottle mouth defect can be detected exactly and method how is provided to become the current technical issues that need to address.
Summary of the invention
The invention provides a kind of transparent vessel whorl of bottleneck defect detecting system and method, transparent vessel bottle mouth defect (as excessive in flight pitch or too small, screw thread is damaged, all number of screw thread is not enough) can be detected quickly and accurately, accuracy of detection is high, detection speed is fast, stability is high, efficiently solves the difficult problem that transparent vessel whorl of bottleneck quick high accuracy detects.
First aspect, the invention provides a kind of transparent vessel whorl of bottleneck defect detecting system, comprising: multiple camera light source group and the image processor be connected with described camera light source group;
Each camera light source group comprises: be positioned at a camera on a primary optical axis and a light source for emitting parallel light, described camera is connected with described image processor;
Described multiple camera light source group is uniformly distributed around transparent vessel bottleneck to be detected, and in the group of arbitrary camera light source, described light source is positioned at the below of described transparent vessel bottleneck to be detected, and described camera is positioned at the top of described transparent vessel bottleneck to be detected;
Described camera is entered after the part threaded portion to be detected of transparent vessel bottleneck to be detected described in the directional light transmission that described light source is launched, to form the partial threads image of described transparent vessel bottleneck to be detected, the intersection point of the directional light of the light source transmitting of described multiple camera light source group is in the central area of described transparent vessel bottleneck to be detected;
Described image processor, for receiving multiple partial threads images that in described multiple camera light source group, multiple camera is formed, and determines the whorl of bottleneck whether defectiveness of described transparent vessel to be detected according to described multiple partial threads image.
Alternatively, described light source is parallel surface light source;
And/or,
The quantity of described camera is 4 or 6;
And/or,
Described camera is low-resolution cameras.
Second aspect, the invention provides a kind of transparent vessel whorl of bottleneck defect inspection method based on above-mentioned transparent vessel whorl of bottleneck defect detecting system, comprising:
Obtain multiple partial threads images of the transparent vessel to be detected that multiple camera sends;
According to the black shade spacing in described multiple partial threads image, detect the defect of the flight pitch of described transparent vessel bottleneck to be detected;
According to the black shade in described multiple partial threads image, detect the defect of the screw thread breakage of described transparent vessel bottleneck to be detected;
According to the screw thread closing in position in described multiple partial threads image, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected.
Alternatively, described according to the black shade in described multiple partial threads image, detect the defect of the screw thread breakage of described transparent vessel bottleneck to be detected, comprising:
Detect in the white portion in described multiple partial threads image and whether occur whether blackspot or black camber line width occur that unexpected difference obviously even ruptures, if so, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread breakage;
And/or,
Described according to the screw thread closing in position in described multiple partial threads image, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected, comprising:
The distance and the preset standard position that the position of the closing in point in described multiple partial threads image and the point that closes up are arrived bottleneck edge contrast, judge that whether all numbers of screw thread are up to standard, if not, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread week number.
The third aspect, the invention provides a kind of transparent vessel whorl of bottleneck defect detecting system, comprising: camera, light source, a mirror system and the image processor be connected with described camera;
Described mirror system, comprising: a reflection circular cone and a Perimeter Truss Reflector;
Described light source be positioned at transparent vessel bottleneck to be detected below and around the annular/circular arc light source of transparent vessel bottleneck to be detected, described camera and described mirror system are positioned at the top of transparent vessel bottleneck to be detected, described mirror system is injected after the threaded portion to be detected of transparent vessel bottleneck to be detected described in the directional light transmission that described light source is launched, successively after the reflection of described Perimeter Truss Reflector and described reflection circular cone, enter the complete thread image that described camera forms described transparent vessel bottleneck to be detected;
Described image processor, for receiving the complete thread image that described camera is formed, and determines the whorl of bottleneck whether defectiveness of described transparent vessel to be detected according to described complete thread image.
Alternatively, described camera is high resolution camera.
Alternatively, described reflection circular cone is the reflection circular cone of central aperture;
Correspondingly, described mirror system, also comprises: concavees lens;
Described concavees lens embed in the perforate of reflection circular cone of described central aperture, just to the camera lens of described camera;
Described mirror system is injected after the threaded portion to be detected of transparent vessel bottleneck to be detected described in the directional light transmission that described light source is launched, successively after described Perimeter Truss Reflector with the reflection of the reflection circular cone of the described concavees lens of embedding, enter the complete thread image that described camera forms described transparent vessel bottleneck to be detected, described camera carries out image checking by the vision field extension effect of described concavees lens to described transparent vessel bottleneck end face to be detected simultaneously.
Alternatively, described light source is two circular arc light sources;
Correspondingly, described transparent vessel whorl of bottleneck defect detecting system, also comprises: the station that two structures are identical, for adopting the mode of machinery by container half-twist.
Fourth aspect, the invention provides a kind of transparent vessel whorl of bottleneck defect inspection method based on above-mentioned transparent vessel whorl of bottleneck defect detecting system, comprising:
Obtain the complete thread image of the transparent vessel bottleneck to be detected that camera sends;
According to the black shade spacing in described complete thread image, detect the defect of the flight pitch of described transparent vessel bottleneck to be detected;
According to the black shade in described complete thread image, detect the defect of the screw thread breakage of described transparent vessel bottleneck to be detected;
According to the starting point of screw thread in described complete thread image, around curve and closing in point, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected.
Alternatively, described according to the black shade in described complete thread image, detect the defect of the screw thread breakage of described transparent vessel bottleneck to be detected, comprising:
Detect in the white portion in described complete thread image and whether occur whether blackspot or black camber line width occur that unexpected difference obviously even ruptures, if so, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread breakage;
And/or,
Described according to described complete thread image, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected, comprising:
According to the starting point of screw thread in described complete thread image, around curve and closing in point, judge that whether all numbers of screw thread are up to standard, if not, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread week number.
As shown from the above technical solution, transparent vessel whorl of bottleneck defect detecting system of the present invention and method, transparent vessel bottle mouth defect (as excessive in flight pitch or too small, screw thread is damaged, all number of screw thread is not enough) can be detected quickly and accurately, accuracy of detection is high, detection speed is fast, stability is high, efficiently solves the difficult problem that transparent vessel whorl of bottleneck quick high accuracy detects.
Accompanying drawing explanation
The structural representation of the transparent vessel whorl of bottleneck defect detecting system that Fig. 1 provides for one embodiment of the invention;
The schematic flow sheet of the transparent vessel whorl of bottleneck defect inspection method based on the whorl of bottleneck of transparent vessel shown in Fig. 1 defect detecting system that Fig. 2 provides for one embodiment of the invention;
The structural representation of the transparent vessel whorl of bottleneck defect detecting system that Fig. 3 provides for another embodiment of the present invention;
The structural representation of the transparent vessel whorl of bottleneck defect detecting system that Fig. 4 provides for another embodiment of the present invention;
The schematic flow sheet of the transparent vessel whorl of bottleneck defect inspection method based on the whorl of bottleneck of transparent vessel shown in Fig. 3 and Fig. 4 defect detecting system that Fig. 5 provides for one embodiment of the invention;
Reference numeral:
1, camera; 2, light source; 3, Perimeter Truss Reflector; 4, circular cone is reflected; 5, the reflection circular cone of central aperture; 6, concavees lens; 7, image processor; 8, mirror system; 9, transparent vessel bottleneck to be detected.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
The structural representation of the transparent vessel whorl of bottleneck defect detecting system that Fig. 1 provides for one embodiment of the invention, as shown in Figure 1, the transparent vessel whorl of bottleneck defect detecting system of the present embodiment, comprising: multiple camera light source group and the image processor 7 be connected with described camera light source group;
Each camera light source group comprises: be positioned at the camera 1 on a primary optical axis and a light source 2 for emitting parallel light, described camera 1 is connected with described image processor 7;
Described multiple camera light source group is uniformly distributed around transparent vessel bottleneck to be detected, and in the group of arbitrary camera light source, described light source 2 is positioned at the below of described transparent vessel bottleneck 9 to be detected, and described camera 1 is positioned at the top of described transparent vessel bottleneck 9 to be detected;
Described camera 1 is entered after the part threaded portion to be detected of transparent vessel bottleneck 9 to be detected described in the directional light transmission that described light source 2 is launched, to form the partial threads image of described transparent vessel bottleneck 9 to be detected, the intersection point of the directional light of light source 2 transmitting of described multiple camera light source group is in the central area of described transparent vessel bottleneck 9 to be detected;
Described image processor 7, for receiving multiple partial threads images that in described multiple camera light source group, multiple camera 1 is formed, and determines the bottleneck 9 screw thread whether defectiveness of described transparent vessel to be detected according to described multiple partial threads image.
In a particular application, described in the present embodiment, light source 2 can be preferably parallel surface light source.
In a particular application, for example, described in the present embodiment, the quantity of camera 1 can be preferably 4 or 6.
In a particular application, described in the present embodiment, camera 1 is low-resolution cameras.
In a particular application, described in the present embodiment, camera 1 can be preferably industrial camera.
In a particular application, for example, image processor 7 described in the present embodiment can be industrial computer, embedded board or other FPGA (Field Programmable Gate Array) treating apparatus.
Will be understood that, for transparent vessel, the low form effect of reflected light imaging that causes of reflectivity is poor.If be glass container, due to its blowing mold, threaded portion surface is often uneven, and this causes the assorted point of reflected light imaging a lot, reduce further picture quality.The selection so the mode of employing transmission is inevitable.Camera is tilted to downwards angle of visibility can make screw image very clear from back side observation screw thread, and can resist the interference that body rocks, and is suitable for the mode of on-line checkingi.
Will be understood that, the every width image in multiple partial threads image described in the present embodiment can observe the clear screw thread camber line at the bottleneck back side and the screw thread camber line in front, but the camber line at the back side is steady and audible, can be used as main detection means.The camber line of normal screw thread is chequered with black and white, and black shade continuously and width stable and uniform.Black shade spacing can be used as the foundation detecting flight pitch.When there is white portion, when occurring that blackspot or the unexpected difference of black camber line width obviously even rupture, then show that this region screw thread occurs damaged.Screw thread closing in position is the judgment criteria of screw thread week number, arrive the distance at bottleneck edge by obtaining the close up position of point and the point that closes up of screw thread in every width image of identifying in described multiple partial threads image and contrast with normal place, judge the screw thread week number defect detecting screw thread week number whether up to standard, this method is applicable to non-axis symmetry container.
Will be understood that, can according to the present embodiment multiple partial threads image, synthesize the complete thread image of transparent vessel 9 to be detected.
Transparent vessel whorl of bottleneck defect detecting system of the present invention and method, transparent vessel bottle mouth defect (as excessive in flight pitch or too small, screw thread is damaged, all number of screw thread is not enough) can be detected quickly and accurately, accuracy of detection is high, detection speed is fast, stability is high, efficiently solves the difficult problem that transparent vessel whorl of bottleneck quick high accuracy detects.
The advantage of the transparent vessel whorl of bottleneck defect detecting system of the present embodiment is:
One, be that capture mode is direct, be convenient to each camera and independently adjust;
Two, be have interval between light source while of realizing 360 ° of comprehensive detections, still can reserve the space that container runs on a moving belt, not need rotary container, namely a station completes detection;
Three, be that the observation angle undertaken due to each camera is less, so use the lower camera of resolution still can realize high-precision detection, and the camera image collection of low resolution, transmission and processing time are all very fast, multiple camera can realize parallel transmission and computing, thus significantly add on-line checkingi speed, be applicable to accuracy of detection and all exigent occasion of detection speed.
Fig. 2 shows the schematic flow sheet of the transparent vessel whorl of bottleneck defect inspection method based on the whorl of bottleneck of transparent vessel shown in Fig. 1 defect detecting system that one embodiment of the invention provides, as shown in Figure 3, the transparent vessel whorl of bottleneck defect inspection method of the present embodiment is as described below.
201, multiple partial threads images of the transparent vessel to be detected that multiple camera sends are obtained.
202, according to the black shade spacing in described multiple partial threads image, the defect of the flight pitch of described transparent vessel bottleneck to be detected is detected.
203, according to the black shade in described multiple partial threads image, the defect of the screw thread breakage of described transparent vessel bottleneck to be detected is detected.
In a particular application, described step 203, can specifically comprise:
Detect in the white portion in described multiple partial threads image and whether occur whether blackspot or black camber line width occur that unexpected difference obviously even ruptures, if so, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread breakage.
204, according to the screw thread closing in position in described multiple partial threads image, the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected is detected.
In a particular application, described step 204, can specifically comprise:
The distance and the preset standard position that the position of the closing in point in described multiple partial threads image and the point that closes up are arrived bottleneck edge contrast, judge that whether all numbers of screw thread are up to standard, if not, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread week number.
The transparent vessel whorl of bottleneck defect inspection method of the present embodiment, based on the transparent vessel whorl of bottleneck defect detecting system in embodiment illustrated in fig. 1, realized by the image processor of the transparent vessel whorl of bottleneck defect detecting system in embodiment illustrated in fig. 1, transparent vessel bottle mouth defect (as excessive in flight pitch or too small, screw thread is damaged, all number of screw thread is not enough) can be detected quickly and accurately, accuracy of detection is high, detection speed is fast, stability is high, efficiently solves the difficult problem that transparent vessel whorl of bottleneck quick high accuracy detects.
The structural representation of the transparent vessel whorl of bottleneck defect detecting system that Fig. 3 provides for another embodiment of the present invention, as shown in Figure 3, the transparent vessel whorl of bottleneck defect detecting system of the present embodiment, comprising: camera 1, light source 2, a mirror system 8 and the image processor 7 be connected with described camera 1;
Described mirror system 8, comprising: a reflection circular cone 4 and a Perimeter Truss Reflector 3;
Described light source 2 for be positioned at transparent vessel bottleneck 9 to be detected below and around the annular/circular arc light source of transparent vessel bottleneck 9 to be detected, described camera 1 and described mirror system 8 are positioned at the top of transparent vessel bottleneck 9 to be detected, described mirror system 8 is injected after the threaded portion to be detected of transparent vessel bottleneck 9 to be detected described in the directional light transmission that described light source 2 is launched, successively after the reflection of described Perimeter Truss Reflector 3 and described reflection circular cone 4, enter the complete thread image that described camera 1 forms described transparent vessel bottleneck 9 to be detected;
Described image processor 7, for receiving the complete thread image that described camera 1 is formed, and determines the bottleneck 9 screw thread whether defectiveness of described transparent vessel to be detected according to described complete thread image.
In a particular application, described in the present embodiment, camera 1 is high resolution camera.
In a particular application, described in the present embodiment, camera 1 can be preferably industrial camera.
In a particular application, for example, image processor 7 described in the present embodiment can be industrial computer, embedded board or other FPGA (Field Programmable Gate Array) treating apparatus.
Further, in an embody rule, as shown in Figure 4, the reflection circular cone 5 that circular cone 4 is central aperture is reflected described in the present embodiment;
Correspondingly, described mirror system 8, also comprises: concavees lens 6;
Described concavees lens 6 embed in the perforate of reflection circular cone 5 of described central aperture, just to the camera lens of described camera 1;
Described mirror system 8 is injected after the threaded portion to be detected of transparent vessel bottleneck 9 to be detected described in the directional light transmission that described light source 2 is launched, successively after described Perimeter Truss Reflector 3 with the reflection of the reflection circular cone 5 of the described concavees lens 6 of embedding, enter the complete thread image that described camera 1 forms described transparent vessel bottleneck 9 to be detected, described camera 1 carries out imaging (quality) detection by the vision field extension effect of described concavees lens 6 to described transparent vessel bottleneck 9 end face to be detected simultaneously.
Particularly, comprise in the transparent vessel whorl of bottleneck defect detecting system of the reflection circular cone 5 of concavees lens 6 and central aperture at the present embodiment, light source described in the present embodiment can be preferably two circular arc light sources;
Correspondingly, transparent vessel whorl of bottleneck defect detecting system described in the present embodiment, also can comprise: the station that two structures are identical, for adopting the mode of machinery by container half-twist.
It should be noted that by perforate on circular cone, also can detect the breakage of bottleneck end face while detection screw thread simultaneously.In the present embodiment, the application target of concavees lens is larger field range and bottleneck and screw thread is focused blur-free imaging simultaneously.In order to realize on-line checkingi, the space that two circular arc light sources replacement annular light sources move on a moving belt to reserve container can be used, but can blind area be brought so simultaneously.Can pass through the identical station of use two structures, the middle mode of machinery that adopts, by container half-twist, detects to realize non-blind area.
Will be understood that, the image of 360 ° is reflexed to complete imaging in top camera by the mode that the present embodiment have employed catoptron group, and optical texture is more complicated.
It should be noted that the present embodiment is in order to ensure that accuracy of detection needs to be equipped with high-resolution camera, this obviously reduces image transmitting and processing speed, but the advantage of this structure is also clearly:
One, be that cost is often lower compared with transparent vessel whorl of bottleneck defect detecting system embodiment illustrated in fig. 1;
Two, be that structure is compacter, space hold is less;
Three, be that system call interception is convenient.Be applicable to cost and space comparatively responsive, require slightly low to detection speed, or detection speed requires that high but accuracy of detection requires slightly low occasion.
Will be understood that, the present embodiment can observe complete screw thread arcs line structure, more contributes to judging.Differentiating flight pitch, identical with embodiment illustrated in fig. 1 with damaged method (namely the camber line of normal screw thread is chequered with black and white, the continuous and width stable and uniform of black shade.Black shade spacing can be used as the foundation detecting flight pitch.When there is blackspot or the unexpected difference of black camber line width obviously even ruptures, then show that this region screw thread occurs damaged), the present embodiment due to can completely observe screw thread starting point, around curve and closing in point, so can directly differentiate screw thread week number whether up to standard detect screw thread week number defect.
Transparent vessel whorl of bottleneck defect detecting system of the present invention and method, transparent vessel bottle mouth defect (as excessive in flight pitch or too small, screw thread is damaged, all number of screw thread is not enough) can be detected quickly and accurately, accuracy of detection is high, detection speed is fast, stability is high, efficiently solves the difficult problem that transparent vessel whorl of bottleneck quick high accuracy detects.
The advantage of the transparent vessel whorl of bottleneck defect detecting system of the present embodiment is:
One, non-contact detecting.Adopt the mode of vision-based detection, to transparent vessel noncontact.Damage that container is caused and pollution can be avoided.
Two, accuracy of detection is high.Because this method imaging effect is good, it is little to disturb, stability is high, again by multiple camera parallel detection or utilize mirror system to arrange in pairs or groups high-resolution camera, accuracy of detection significantly promotes compared with classic method, meets the requirement of manufacturing enterprise's double thread quality precision completely.
Three, detection speed is fast.Detection algorithm is simply effective, and calculated amount is little, thus computing velocity is fast.The detection speed being not less than 600 bottles/minute can be supported, meet production line demand completely.
Four, defect kind can be detected many.For the number of drawbacks that container finish screw thread is common, as excessive in spacing or too small, screw thread is damaged, all numbers of screw thread are not enough etc. all can realize high precision test.
Five, can on-line checkingi on a production line.Due to the above-mentioned advantage of this method, add and can be installed on travelling belt easily, do not affect container transport, and debug convenient, so be very suitable for on-line checkingi.
Fig. 5 shows the schematic flow sheet of the transparent vessel whorl of bottleneck defect inspection method based on the whorl of bottleneck of transparent vessel shown in Fig. 3 and Fig. 4 defect detecting system that one embodiment of the invention provides, as shown in Figure 5, the transparent vessel whorl of bottleneck defect inspection method of the present embodiment is as described below.
501, the complete thread image of the transparent vessel bottleneck to be detected that camera sends is obtained.
502, according to the black shade spacing in described complete thread image, the defect of the flight pitch of described transparent vessel bottleneck to be detected is detected.
503, according to the black shade in described complete thread image, the defect of the screw thread breakage of described transparent vessel bottleneck to be detected is detected.
In a particular application, described step 503, can specifically comprise:
Detect in the white portion in described complete thread image and whether occur whether blackspot or black camber line width occur that unexpected difference obviously even ruptures, if so, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread breakage.
504, according to the starting point of screw thread in described complete thread image, around curve and closing in point, detect described transparent vessel bottleneck to be detected screw thread week number defect.
In a particular application, described step 504, can specifically comprise:
According to the starting point of screw thread in described complete thread image, around curve and closing in point, judge that whether all numbers of screw thread are up to standard, if not, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread week number.
The transparent vessel whorl of bottleneck defect inspection method of the present embodiment, based on the transparent vessel whorl of bottleneck defect detecting system in Fig. 3 and 4 illustrated embodiments, realized by the image processor of the transparent vessel whorl of bottleneck defect detecting system in Fig. 3 and 4 illustrated embodiments, transparent vessel bottle mouth defect (as excessive in flight pitch or too small, screw thread is damaged, all number of screw thread is not enough) can be detected quickly and accurately, accuracy of detection is high, detection speed is fast, stability is high, efficiently solves the difficult problem that transparent vessel whorl of bottleneck quick high accuracy detects.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of claim of the present invention protection.
Claims (10)
1. a transparent vessel whorl of bottleneck defect detecting system, is characterized in that, comprising: multiple camera light source group and the image processor be connected with described camera light source group;
Each camera light source group comprises: be positioned at a camera on a primary optical axis and a light source for emitting parallel light, described camera is connected with described image processor;
Described multiple camera light source group is uniformly distributed around transparent vessel bottleneck to be detected, and in the group of arbitrary camera light source, described light source is positioned at the below of described transparent vessel bottleneck to be detected, and described camera is positioned at the top of described transparent vessel bottleneck to be detected,
Described camera is entered after the part threaded portion to be detected of transparent vessel bottleneck to be detected described in the directional light transmission that described light source is launched, to form the partial threads image of described transparent vessel bottleneck to be detected, the intersection point of the directional light of the light source transmitting of described multiple camera light source group is in the central area of described transparent vessel bottleneck to be detected;
Described image processor, for receiving multiple partial threads images that in described multiple camera light source group, multiple camera is formed, and determines the whorl of bottleneck whether defectiveness of described transparent vessel to be detected according to described multiple partial threads image.
2. system according to claim 1, is characterized in that, described light source is parallel surface light source;
And/or,
The quantity of described camera is 4 or 6;
And/or,
Described camera is low-resolution cameras.
3., in a transparent vessel whorl of bottleneck defect inspection method for system according to any one of claim 1 to 2, it is characterized in that, comprising:
Obtain multiple partial threads images of the transparent vessel to be detected that multiple camera sends;
According to the black shade spacing in described multiple partial threads image, detect the defect of the flight pitch of described transparent vessel bottleneck to be detected;
According to the black shade in described multiple partial threads image, detect the defect of the screw thread breakage of described transparent vessel bottleneck to be detected;
According to the screw thread closing in position in described multiple partial threads image, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected.
4. method according to claim 3, is characterized in that, described according to the black shade in described multiple partial threads image, detects the defect of the screw thread breakage of described transparent vessel bottleneck to be detected, comprising:
Detect in the white portion in described multiple partial threads image and whether occur whether blackspot or black camber line width occur that unexpected difference obviously even ruptures, if so, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread breakage;
And/or,
Described according to the screw thread closing in position in described multiple partial threads image, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected, comprising:
The distance and the preset standard position that the position of the closing in point in described multiple partial threads image and the point that closes up are arrived bottleneck edge contrast, judge that whether all numbers of screw thread are up to standard, if not, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread week number.
5. a transparent vessel whorl of bottleneck defect detecting system, is characterized in that, comprising: camera, light source, a mirror system and the image processor be connected with described camera;
Described mirror system, comprising: a reflection circular cone and a Perimeter Truss Reflector;
Described light source be positioned at transparent vessel bottleneck to be detected below and around the annular/circular arc light source of transparent vessel bottleneck to be detected, described camera and described mirror system are positioned at the top of transparent vessel bottleneck to be detected, described mirror system is injected after the threaded portion to be detected of transparent vessel bottleneck to be detected described in the directional light transmission that described light source is launched, successively after the reflection of described Perimeter Truss Reflector and described reflection circular cone, enter the complete thread image that described camera forms described transparent vessel bottleneck to be detected;
Described image processor, for receiving the complete thread image that described camera is formed, and determines the whorl of bottleneck whether defectiveness of described transparent vessel to be detected according to described complete thread image.
6. transparent vessel whorl of bottleneck defect detecting system according to claim 5, is characterized in that, described camera is high resolution camera.
7. transparent vessel whorl of bottleneck defect detecting system according to claim 5, is characterized in that, described reflection circular cone is the reflection circular cone of central aperture;
Correspondingly, described mirror system, also comprises: concavees lens;
Described concavees lens embed in the perforate of reflection circular cone of described central aperture, just to the camera lens of described camera;
Described mirror system is injected after the threaded portion to be detected of transparent vessel bottleneck to be detected described in the directional light transmission that described light source is launched, successively after described Perimeter Truss Reflector with the reflection of the reflection circular cone of the described concavees lens of embedding, enter the complete thread image that described camera forms described transparent vessel bottleneck to be detected, described camera carries out image checking by the vision field extension effect of described concavees lens to described transparent vessel bottleneck end face to be detected simultaneously.
8. transparent vessel whorl of bottleneck defect detecting system according to claim 7, is characterized in that, described light source is two circular arc light sources;
Correspondingly, described transparent vessel whorl of bottleneck defect detecting system, also comprises: the station that two structures are identical, for adopting the mode of machinery by container half-twist.
9., in a transparent vessel whorl of bottleneck defect inspection method for system according to any one of claim 5 to 8, it is characterized in that, comprising:
Obtain the complete thread image of the transparent vessel bottleneck to be detected that camera sends;
According to the black shade spacing in described complete thread image, detect the defect of the flight pitch of described transparent vessel bottleneck to be detected;
According to the black shade in described complete thread image, detect the defect of the screw thread breakage of described transparent vessel bottleneck to be detected;
According to the starting point of screw thread in described complete thread image, around curve and closing in point, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected.
10. method according to claim 9, is characterized in that, described according to the black shade in described complete thread image, detects the defect of the screw thread breakage of described transparent vessel bottleneck to be detected, comprising:
Detect in the white portion in described complete thread image and whether occur whether blackspot or black camber line width occur that unexpected difference obviously even ruptures, if so, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread breakage;
And/or,
Described according to described complete thread image, detect the defect of all numbers of screw thread of described transparent vessel bottleneck to be detected, comprising:
According to the starting point of screw thread in described complete thread image, around curve and closing in point, judge that whether all numbers of screw thread are up to standard, if not, then determine that described transparent vessel bottleneck to be detected has the defect of screw thread week number.
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